Mackie CR8SBT Creative Reference Subwoofer with Bluetooth combines professional quality sound with powerful dedicated bass reinforcement for your studio or home. The sleek design looks great in any room and is the perfect match for any CR Series monitors. Flexible rear panel inputs and outputs include 1/4" TRS and RCA plus easy Bluetooth pairing for effortless streaming. Dial your sound in just right with Input and Output level controls plus a variable crossover and polarity switch. The included CRDV Desktop Volume Control makes controlling your system a breeze from studio reference to casual listening.